2017 杭电多校联赛第二场 1001 Is Derek lying? HDU 6045

Is Derek lying? Time Limit: 3000/1000 MS (Java/Others)    Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 0    Accepted Submission(s): 0 Problem Description Derek and  Alfia are good fr
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